BCM BCM4 MCMR-13 5.56 NATO AR-15 – 14.5 in Pinned/Welded to 16.5 in, Burris RT-6 1-6x24, Geissele SD-E Trigger
This BCM BCM4 MCMR-13 is a well-configured 5.56 NATO AR-15 with a 14.5-inch barrel that is blind pinned and welded to a legal overall length of approximately 16.5 inches using a BCMGUNFIGHTER Flash Hider Mod 0 (tri-prong). It comes upgraded with a Geissele Automatics SD-E flat-bow two-stage trigger and a Burris RT-6 1-6x24 scope in a Burris P.E.P.R. one-piece mount. The rifle retains BCM’s proven components throughout, including a BCM-marked bolt carrier group, a T-marked upper rail, and the free-float MCMR-13 handguard.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This rifle shows a few minor scratches and small blemishes from light handling.
What’s Included
- Burris RT-6 1-6x24 scope (illuminated reticle, 30 mm tube)
- Burris P.E.P.R. one-piece mount
- Geissele Automatics Super Dynamic Enhanced (SD-E) 2-stage trigger (installed)
- OEM trigger (not installed)
- 1x 30-round Magpul PMAG (polymer)
The BCM BCM4 lower is marked "Model BCM4" and "CAL MULTI" with SAFE/SEMI selector markings, paired with a BCM upper that features a T-marked Picatinny top rail, forward assist, and ejection-port cover. The bolt carrier group is BCM-marked. The rifle is semi-automatic, direct impingement, and chambered in 5.56mm NATO with a stated capacity of 30+1.
The 14.5-inch barrel is fitted with a BCMGUNFIGHTER Flash Hider Mod 0 (5.56, tri-prong) that is blind pinned and welded to achieve an overall barrel length of approximately 16.5 inches. This configuration delivers the compact handling of a 14.5 while maintaining legal overall length.
Its BCM MCMR-13 free-float aluminum handguard provides a full-length top rail, M-LOK attachment interface, and integral QD sling sockets. Furniture includes a 6-position collapsible stock and a textured polymer pistol grip with a beavertail. An ambidextrous safety selector is installed.
A Geissele Automatics SD-E two-stage flat-bow trigger (approximately 3.5 lb) is installed for precise control, and the original OEM trigger is included. Optics are set with a Burris RT-6 1-6x24 scope featuring an illuminated reticle and 30 mm tube, mounted in a Burris P.E.P.R. one-piece mount for solid alignment and eye relief. One 30-round Magpul PMAG is included.