Skip to content

Filters

Clear filters

External Rifle Parts & Upgrades

External Rifle Parts & Upgrades (266 Results)

  • 05-792B
    05-650S

    Geissele Automatics MK16 | Super Modular Rail | AR15 Handguard | 13.5" | M-LOK | Anodized Finish | Desert Dirt Color

    $375.00
    $375.00 - $375.00
    $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated ve...

    View full details
  • 08-163B-H2
    Backordered

    Geissele Automatics Buffer Tube Complete Assembly | Fits AR-15 | Anodized Finish | Black | 6-Position | H2 Buffer | Super 42 Spring

    $161.00
    $161.00 - $161.00
    $161.00
    $161.00
    $161.00 - $161.00
    $161.00

    The Geissele Premium Mil-Spec Buffer Tube is machined from 7075-T6 aluminum, finished in Type 3 Hardcoat Anodize, and built to mil-spec standards. ...

    View full details
  • 08-159
    Backordered

    Geissele Automatics URG-I | Near Clone | Complete Upper Receiver | 5.56 NATO | 14.5" (16" OAL) Barrel | 1:7 Twist | Pinned and Welded Surefire 4 Prong Flash Hider | Desert Dirt Color 13.5" SMR MK16 M-LOK Free Float Handguard | Desert Dirt Color Ge

    $1,525.00
    $1,525.00 - $1,525.00
    $1,525.00
    $1,525.00
    $1,525.00 - $1,525.00
    $1,525.00

    For more than 50 years the famed silhouette of the M16/M4 has only had one major and several minor changes. Barrel lengths and buttstocks have chan...

    View full details
  • 05-791S
    Backordered

    Geissele Automatics MK18 | Super Modular Rail | ARCA-Swiss Handguard | 16" | M-LOK | Fits AR-15 | Anodized Finish | Desert Dirt Color

    $450.00
    $450.00 - $450.00
    $450.00
    $450.00
    $450.00 - $450.00
    $450.00

    The MK18 is the latest in the line of Geissele Super Modular rails and is specifically made to interface with the Arca-Swiss Quick Release System. ...

    View full details
  • 05-650B

    Geissele Automatics MK16 | Super Modular Rail | AR15 Handguard | 13.5" | M-LOK | Anodized Finish | Black

    $350.00
    $350.00 - $350.00
    $350.00
    $350.00
    $350.00 - $350.00
    $350.00

    The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated ve...

    View full details
  • 08-162B
    Backordered

    Geissele Automatics Buffer Tube | Fits AR-15 | Anodized Finish | Black | 6-Position

    $68.00
    $68.00 - $68.00
    $68.00
    $68.00
    $68.00 - $68.00
    $68.00

    The Geissele Premium Mil-Spec Buffer Tube is machined from quality 7075-T6 Aluminum and finished in Type 3 Hardcoat Anodize, available in Black, Ge...

    View full details
  • 05-578S

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $325.00
    $325.00 - $325.00
    $325.00
    $325.00
    $325.00 - $325.00
    $325.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-792S

    Geissele Automatics MK16 | Super Modular Rail | AR15 Handguard | 15" | M-LOK | Anodized Finish | Desert Dirt Color

    $400.00
    $400.00 - $400.00
    $400.00
    $400.00
    $400.00 - $400.00
    $400.00

    The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated ve...

    View full details
  • 05-578B

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $300.00
    $300.00 - $300.00
    $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-573S
    Backordered

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 13.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due t

    $375.00
    $375.00 - $375.00
    $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-575B
    Backordered

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 15" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $375.00
    $375.00 - $375.00
    $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-575S

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 15" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $400.00
    $400.00 - $400.00
    $400.00
    $400.00
    $400.00 - $400.00
    $400.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-492-H3
    Backordered

    Geissele Automatics Reliability Enhancement Kit | Parts Kit | Includes Reliability Enhanced Bolt Carrier Group | Super 42 Braided Wire Buffer Spring | H3 Buffer Weight | Silver

    $494.00
    $494.00 - $494.00
    $494.00
    $494.00
    $494.00 - $494.00
    $494.00

    The Reliability Enhanced Bolt Carrier Group is a 5.56mm full-mass, full-auto-rated M16/M4 bolt carrier group manufactured in Geissele's state-of-th...

    View full details
  • 05-492-H1
    Backordered

    Geissele Automatics Reliability Enhancement Kit | Parts Kit | Includes Reliability Enhanced Bolt Carrier Group | Super 42 Braided Wire Buffer Spring | H1 Buffer Weight | Silver

    $444.00
    $444.00 - $444.00
    $444.00
    $444.00
    $444.00 - $444.00
    $444.00

    The Reliability Enhanced Bolt Carrier Group is a 5.56mm full-mass, full-auto-rated M16/M4 bolt carrier group manufactured in Geissele's state-of-th...

    View full details
  • 05-286B
    05-285S

    Geissele Automatics MK8 | Super Modular Rail | Handguard | 13.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $375.00
    $375.00 - $375.00
    $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    The Super Modular Rail (SMR) MK8 M-LOK is Geissele's ultra-modular handguard model. The SMR MK8 is one of the first rails available to utilize the ...

    View full details
  • 05-573B

    Geissele Automatics MK14 | Super Modular Rail | Handguard | 13.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $350.00
    $350.00 - $350.00
    $350.00
    $350.00
    $350.00 - $350.00
    $350.00

    Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard desi...

    View full details
  • 05-315S
    Backordered

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 15" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to t

    $400.00
    $400.00 - $400.00
    $400.00
    $400.00
    $400.00 - $400.00
    $400.00

    Versatile and innovative, Geissele's MK4 DDC Super Modular Rail is a perfect addition to any AR-platform. It features a full length picatinny rail ...

    View full details
  • 05-495

    Geissele Automatics Super 42 Braided Wire Buffer and Spring Combo | Not Compatible with Rifle Length or A5 Buffer Tubes/Receiver Extensions | Fits AR15

    $89.00
    $89.00 - $89.00
    $89.00
    $89.00
    $89.00 - $89.00
    $89.00

    The Geissele Super 42 Buffer Spring/Buffer Combo was designed to improve the function and reliability of your AR-15 pattern rifle. Its unique sprin...

    View full details
  • 05-492-H2
    Backordered

    Geissele Automatics Reliability Enhancement Kit | Parts Kit | Includes R^eliability Enhanced Bolt Carrier Group | Super 42 Braided Wire Buffer Spring | H2 Buffer Weight | Silver

    $469.00
    $469.00 - $469.00
    $469.00
    $469.00
    $469.00 - $469.00
    $469.00

    The Reliability Enhanced Bolt Carrier Group is a 5.56mm full-mass, full-auto-rated M16/M4 bolt carrier group manufactured in Geissele's state-of-th...

    View full details
  • 05-1657B
    Backordered

    Geissele Automatics MK8 | Super Modular Rail | Handguard | 10.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $325.00
    $325.00 - $325.00
    $325.00
    $325.00
    $325.00 - $325.00
    $325.00

    Versatile and innovative, Geissele's MK8 DDC Super Modular Rail is a perfect addition to any AR-platform. It features M-LOK attachment points in th...

    View full details
  • 05-284B
    Backordered

    Geissele Automatics MK8 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $300.00
    $300.00 - $300.00
    $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    The Super Modular Rail (SMR) MK8 M-LOK is Geissele's ultra-modular handguard model. The SMR MK8 is one of the first rails available to utilize the ...

    View full details
  • 05-315B
    05-278S

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 13.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $375.00
    $375.00 - $375.00
    $375.00
    $375.00
    $375.00 - $375.00
    $375.00

    The Super Modular Rail (SMR) MK4 M-LOK is Geissele's ultra-lightweight M-LOK handguard option. These rails are purpose-built and feature integrated...

    View full details
  • 05-283S
    Backordered

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $325.00
    $325.00 - $325.00
    $325.00
    $325.00
    $325.00 - $325.00
    $325.00

    The Super Modular Rail (SMR) MK4 M-LOK is Geissele's ultra-lightweight M-LOK handguard option. These rails are purpose-built and feature integrated...

    View full details
  • 05-283B

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $300.00
    $300.00 - $300.00
    $300.00
    $300.00
    $300.00 - $300.00
    $300.00

    The Super Modular Rail (SMR) MK4 M-LOK is Geissele's ultra-lightweight M-LOK handguard option. These rails are purpose-built and feature integrated...

    View full details
  • 05-284S

    Geissele Automatics MK8 | Super Modular Rail | Handguard | 9.3" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $325.00
    $325.00 - $325.00
    $325.00
    $325.00
    $325.00 - $325.00
    $325.00

    The Super Modular Rail (SMR) MK8 M-LOK is Geissele's ultra-modular handguard model. The SMR MK8 is one of the first rails available to utilize the ...

    View full details
  • 05-1073S
    Backordered

    Geissele Automatics MK16 | Super Modular Rail | AR15 Handguard | 10.5" | M-LOK | Anodized Finish | Desert Dirt Color

    $350.00
    $350.00 - $350.00
    $350.00
    $350.00
    $350.00 - $350.00
    $350.00

    The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated ve...

    View full details
  • 05-285B
    05-1657S

    Geissele Automatics MK8 | Super Modular Rail | Handguard | 10.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Desert Dirt Color | Product Finishes | Shade Variations and Other Imperfections Are Normal Due to

    $350.00
    $350.00 - $350.00
    $350.00
    $350.00
    $350.00 - $350.00
    $350.00

    Versatile and innovative, Geissele's MK8 DDC Super Modular Rail is a perfect addition to any AR-platform. It features M-LOK attachment points in th...

    View full details
  • MAG808-GRY
    Save $5.75 Save $0.00

    Magpul Industries X-22 Backpacker Stock | Fits All Ruger 10/22 Takedowns | Including 10/22 Takedowns With Tactical Solutions SB-X Barrels | MOE SL Non-Slip Rubber Butt Pad | Storage Compartment Fits 3-10Rd Magazines | Gray

    $114.95
    $114.95 - $114.95
    $114.95
    $109.20
    $109.20 - $109.20
    $109.20

    The Magpul X-22 Backpacker stock takes the function of their full-size Hunter X-22 Takedown, and pares it down for ease of storage and transportati...

    View full details
  • 05-1656B
    Backordered

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 10.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $325.00
    $325.00 - $325.00
    $325.00
    $325.00
    $325.00 - $325.00
    $325.00

    Versatile and innovative, Geissele's MK4 DDC Super Modular Rail is a perfect addition to any AR-platform. It features a full length picatinny rail ...

    View full details
  • 05-278B

    Geissele Automatics MK4 | Super Modular Rail | Handguard | 13.5" | M-LOK | Barrel Nut Wrench Sold Separately (GEI-02-243) | Gas Block Not Included | Black

    $350.00
    $350.00 - $350.00
    $350.00
    $350.00
    $350.00 - $350.00
    $350.00

    The Super Modular Rail (SMR) MK4 M-LOK is Geissele's ultra-lightweight M-LOK handguard option. These rails are purpose-built and feature integrated...

    View full details
  • MAG760-FDE
    MAG760-BLK
    Save $7.50 Save $0.00

    Magpul Industries Hunter X-22 Takedown Stock | Fits Ruger 10/22 Takedown | Black

    $149.95
    $149.95 - $149.95
    $149.95
    $142.45
    $142.45 - $142.45
    $142.45

    The Magpul Hunter X-22 Takedown chassis is an ergonomic, full-featured stock specifically designed for the Ruger 10/22 Takedown series of rifles. M...

    View full details
  • MAG808-FDE
    MAG808-BLK
    Backordered

    Magpul Industries X-22 Backpacker Stock | Fits All Ruger 10/22 Takedowns | Including 10/22 Takedowns With Tactical Solutions SB-X Barrels | MOE SL Non-Slip Rubber Butt Pad | Storage Compartment Fits 3-10Rd Magazines | Black

    $114.95
    $114.95 - $114.95
    $114.95
    $109.20
    $109.20 - $109.20
    $109.20

    The Magpul X-22 Backpacker stock takes the function of their full-size Hunter X-22 Takedown, and pares it down for ease of storage and transportati...

    View full details
  • MAG802-FDE
    MAG802-BLK
    Save $50.00 Save $0.00

    Magpul Industries Pro 700 Chassis | Fits Remington 700 Short Action | Fits Most AICS Pattern Magazines | Billet Aluminum/ Magpul Polymer Material | Fully Adjustable/Ambidextrous | Push Button Folding Stock | Black

    $999.95
    $999.95 - $999.95
    $999.95
    $949.95
    $949.95 - $949.95
    $949.95

    The Magpul Pro 700 rifle chassis is an uncompromising, full featured precision rifle chassis for short action Remington 700 actions and other Remin...

    View full details
  • MAG931-FDE
    MAG931-BLK
    Save $15.00 Save $0.00

    Magpul Industries Hunter American Stock | Fits Ruger American Short Action | Includes Magpul's Bolt Action Magazine Well | Black

    $299.95
    $299.95 - $299.95
    $299.95
    $284.95
    $284.95 - $284.95
    $284.95

    Continuing the Hunter lineage, Magpul introduces the Hunter American stock. Made from reinforced polymer and an anodized aluminum bedding block wit...

    View full details
  • MAG680-FDE
    MAG680-BLK
    Save $6.00 Save $0.00

    Magpul Industries Zhukov-U Handguard | Fits AK Variants Except Yugo Pattern Rifles or RPK Style Receivers | Polymer Construction | Integrated Heat Shield | M-LOK Mounting Capabilities | Black

    $119.95
    $119.95 - $119.95
    $119.95
    $113.95
    $113.95 - $113.95
    $113.95

    The Zhukov-U Hand Guard shaves off 1.5"" from the original Zhukov AK Hand Guard to accommodate shorter barreled rifles and pistols, and keeps the f...

    View full details
  • LCH-MPX-8
    Backordered

    Lancer Systems Handguard | Replacement Handguard | Sig MPX | Carbon Fiber Black

    $295.99
    $295.99 - $295.99
    $295.99
    $251.99
    $251.99 - $251.99
    $251.99

    Engineered to fit the Sig Sauer MPX, Lancer's Carbon Fiber Lightweight M-LOK Handguard is a drop-in replacement that offers a 50% weight reduction ...

    View full details
Free Shipping

No catches. Always in the USA.

Secure Payment

Guaranteed Secure Payment. SSL AES-256.

Certified 360°

Certified products. Certified and trusted shipping.

Clovis, California

Family owned and operated in the USA.

Professionals Trust Atomic Defense

What People Like You Are Saying

11/10! The small touches made such a big impact, like the patch, stickers and jolly ranchers were something I am beyond grateful for! Amazing product! Great price, very much satisfied.

C. Nelson

If you want updates regularly, just shoot Atomic Defense a message. They always respond quickly and answer any questions you have and can clarify. (*Modified for read-ability and formatting.)

S. Stocker

It's comfortable, like 8.9/10. I'm happy I went with Atomic Defense. Genuine equipment you can trust your life with.(*Modified for read-ability and formatting.)

C. Flick