Details
Cold Snap 7.5 Inch 5.56 NATO AR-15 Pistol Full Build Kit with Magpul BTR Brace
7.5 inch 4150 Chrome Moly Vanadium barrel in 5.56 NATO with 1:7 twist rate, contour profile, phosphate finish, pistol length gas system, micro low profile gas block, 7075-T6 aluminum upper receiver with M4 feed ramps and anodized finish, 7 inch freefloat M-LOK handguard, nitride finished 9310 steel bolt carrier group, mil-spec M4 charging handle, mil-spec heavy duty 6-position buffer tube, 3 oz carbine buffer and spring, Magpul BTR pistol brace, mil-spec receiver end plate, and GI birdcage flash hider. This pistol full build kit delivers ultra-compact AR-15 performance with all major components needed except the lower receiver.
Key Features
- 7.5 inch 5.56 NATO barrel made from 4150 Chrome Moly Vanadium with contour profile, phosphate finish, and 1:7 twist rate stabilizing bullets from 55 to 77 grains
- Pistol length gas system provides reliable cycling with the shortest standard gas tube length, optimized for barrels under 10 inches
- Micro low profile gas block sits flush under the handguard with minimal height and weight
- 7075-T6 aluminum upper receiver with M4 feed ramps and anodized finish provides reliable feeding and corrosion resistance
- 7 inch freefloat M-LOK handguard allows M-LOK accessory mounting while covering most of the barrel length for a clean appearance
- Nitride finished 9310 steel bolt carrier group provides enhanced surface hardness and corrosion resistance
- Magpul BTR pistol brace with tool-free adjustment lever and ambidextrous QD sockets
- Complete buffer system includes mil-spec heavy duty 6-position buffer tube, 3 oz carbine buffer, spring, castle nut, and receiver end plate
- 1/2x28 threaded muzzle with GI birdcage flash hider compatible with 5.56 NATO suppressors and muzzle devices
Perfect For
- Ultra-compact builds prioritizing maximum maneuverability in confined spaces
- Backpack or vehicle carry where every inch of length matters
- Shooters wanting the shortest legal AR-15 configuration with quick length adjustment
- Home defense applications in tight quarters where barrel length improves handling
7.5 Inch Pistol Length Configuration
The 7.5 inch barrel length creates an ultra-compact package with significantly reduced overall length compared to standard carbine configurations. The 1:7 twist rate stabilizes heavier 5.56 NATO bullets in the 62 to 77 grain range, though velocities will be substantially reduced compared to longer barrels. The contour profile tapers from chamber to muzzle, balancing weight distribution while maintaining structural integrity. The phosphate finish protects against corrosion and provides a durable non-reflective surface. The pistol length gas system uses the shortest standard gas tube length, positioning the gas port closer to the chamber to ensure adequate gas pressure for reliable cycling with the limited barrel length. The micro low profile gas block sits flush under the handguard without creating a visible hump. Expect significant muzzle flash and concussion with this barrel length, particularly with standard ammunition.
7 Inch M-LOK Handguard and Upper Receiver
The 7 inch freefloat M-LOK handguard extends nearly to the muzzle device on the 7.5 inch barrel, maximizing accessory mounting space while maintaining the compact profile. The M-LOK slots on the sides and bottom allow direct attachment of lights, grips, and other accessories using M-LOK compatible mounts. The freefloat design means the handguard does not contact the barrel, eliminating pressure points that can shift point of impact as the barrel heats. The 7075-T6 aluminum upper receiver features M4 feed ramps machined into the barrel extension interface, improving feeding reliability with a wide range of bullet profiles and magazine types. The anodized finish provides corrosion resistance and matches the handguard for a cohesive appearance.
Magpul BTR Pistol Brace
The Magpul BTR is an adjustable pistol brace featuring a tool-free adjustment lever that allows quick changes to length of pull across multiple positions on the buffer tube. The brace adjusts and locks securely without requiring any tools or separate levers, making length changes fast and positive even while wearing gloves. The minimalist design keeps weight down while the polymer construction provides durability and a contact surface for stabilizing the firearm. The BTR includes ambidextrous QD sockets on both sides for direct sling attachment without additional hardware. The brace attaches to the included mil-spec heavy duty 6-position buffer tube.
Nitride Bolt Carrier Group and Buffer System
The 9310 steel bolt carrier group features nitride finish across all surfaces, providing superior corrosion resistance and lubricity compared to traditional phosphate finishes. The nitride process diffuses nitrogen into the steel surface, creating a hardened layer that resists wear and reduces friction. This means smoother cycling, easier cleaning, and longer component life. The mil-spec M4 charging handle provides standard ergonomics and reliable operation. The complete buffer system includes the mil-spec heavy duty 6-position buffer tube, 3 oz carbine buffer, standard AR-15 carbine recoil spring, castle nut, and mil-spec receiver end plate. The standard carbine buffer weight is appropriate for the pistol length gas system, providing reliable cycling while managing bolt carrier velocity.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Lower receiver not included.
