Dead Foot Arms Modified Cycle System AR Pistol Kit - Rifle Caliber

Manufactured by Dead Foot Arms
Manufactured by Dead Foot Arms
1 Review

In Stock

Standard orders will ship out 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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Dead Foot Arms LLC is a veteran owned company which produces innovative firearm components through cutting edge design and high-quality manufacturing for commercial, military, and law enforcement markets.

The Dead Foot Arms Modified Cycle System AR Pistol Kit for rifle caliber firearms features a proprietary bolt carrier group/buffer combination. Used in tandem, this buffer/BCG configuration cuts down the receiver extension size on an AR-15 from over 5” to just 2.55”. 

  • Compatible with .223/5.56 and 300 BLK
  • Aluminum receiver extension
  • Hardcoat anodized
  • QD socket equipped end plate
  • Proprietary buffer, springs, and BCG
  • M16 style bolt carrier group finished in TB-41 ION Bond DLC
  • Magnetic particle tested bolt
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BrandDead Foot Arms
TypeStock Adapter

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

1 review

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Shoots well with 300 Blackout and 6.5 Grendel pistols


I used this with my 300 blackout 10.5" upper and it functioned flawlessly. I also used it with my 11" 6.5 Grendel pistol upper without any issues as well. Pricey but it works for me both in the folded position and locked out. It does add to the length of pull with my shockwave brace. I'm going to order the T-Rex buffer tub and tailhook brace in order to shorten the length of pull.