DFA Modified Cycle System -Rifle or 9mm - AR-Pistol Kit 4"

Dead Foot Arms MCS 4" AR-Pistol Kit for rifle calibers or 9mm is our short tube conversion kit that features our patented, dual spring, bufferless technology and uses your bolt carrier group!

It includes: Buffer Tube and End Cap Assembly, end plate with QD port, plunger, recoil/plunger springs. (Rubber bumper & spring cap for 9mm)

If you are going to use your own BCG, and keep it super compact, this product is the shortest receiver extension you can run, period. No one else is even close. 

Note- This product is compatible with the Dead Foot Arms SCW 4 Tailhook and Stock to easily make a compact PDW upgrade.

Compatible with most Rifle Caliber AR-15 pistols and rifles in calibers of: .223, .223Wylde, 5.56, 300 BO, 7.62x39, 6.8 SPC, 6.5 Grendel, .458 SOCOM, 50 Beowulf.

Compatible with most 9mm AR-15 pistols and rifles: For CMMG Radial Delay you will need to order the Rifle Caliber version.

Rifle Caliber - BCG needs to be full auto rated and have an internal diameter of at least 0.62 inches.
9mm - BCG needs to have a removable weight and internal diameter of at least 0.62 inches. 

9mm- ***INTERNAL BCG WEIGHT MUST BE REMOVED PRIOR TO INSTALLATION. PLEASE READ INSTRUCTIONS THAT COMES WITH THE KIT. WARRANTY IS VOIDED IF DAMAGE OCCURS BECAUSE THE WEIGHT WAS NOT REMOVED PRIOR TO INSTALLATION.