5.56 16" Mid Length Gas- H1/H2 Buffer
5.56 16" Mid Length Gas Suppressed- H2/H3 Buffer
5.56 16" Carbine Length Gas- H2/H3 Buffer or Rifle Length Spring with Carbine Buffer
5.56 11.5" Carbine Length Gas- H1/H2
5.56 11.5" Carbine Length Gas Suppressed- H2/H3
300blk 7.5" Pistol Length Gas- H1
300blk 7.5" Pistol Length Gas Suppressed- H1/H2
**PCC Note**
Due to the wide variety of parts and configurations of direct blowback PCCs, we do not suggest using one of our kits unless you are willing to possibly modify the geometry of your bolt carrier. Most PCC BCGs have additional weights placed in the rear of the receiver and may interfere with the system's function. If you are starting from scratch we recommend the CMMG operating system because it mimics the standard AR-15 bolt geometry and allows perfect function out of the box. (we do not accept returns of modified cams and levers).
MARC Compatible triggers
| - Geissele | SSA | Two Stage | YES |
| - Geissele | SSA-E | Two Stage | YES |
| - Geissele | SD3G | Single Stage | YES |
| - Geissele | SD-E | Two Stage | YES |
| - LaRue | MBT-2S (Flat and Curved) | Two Stage | YES WITH MODIFICATION |
| CMMG | Milspec | Single Stage | NO |
| DPMS | Milspec | Single Stage | NO |
| Jacob Gray | Jacob Gray Single Stage | Single Stage | YES |
| MimTac | MimTac Drastic | YES | |
| Noveske | Noveske Single Stage | Single Stage | YES |
| PSA | PSA EPT | YES | |
| PSA | PSA Custom SS Drop In | Single Stage | YES |
| Rise Armament | Rave 140 | Single Stage | YES |
| Rise Armament | RA 434 | Single Stage | YES |
| Rise Armament | RA 535 | Single Stage | YES |
| Rise Armament | RA Blitz | Single Stage | YES |
| Rise Armament | RA LE145 | Single Stage | YES |
| Rise Armament | ICONIC | Two Stage | NO |
| Schmid Inside | Schmid Two-Stage | Two Stage | YES WITH MODIFCATION |
| Schmid Inside | Schmid Pro Line Trigger | Single Stage | YES |
| Schmid Inside | Schmid Inside GI Flat Face SS | Single Stage | YES |
| Schmid Inside | Schmid Inside Match Flat Face SS | Single Stage | YES |
| Smith Defense | AR15 Lower Parts Kit | YES | |
| Sons of Liberty Gun Works | SOLGW LFT | YES | |
| Spikes Tactical | Spikes ST Battle | YES | |
| Timney | Timney Competition 3LB | Single Stage | YES |
| Timney | Calvin Elite | Single State | YES |
| Heckler Koch | HK MR556A1 Trigger | NO |