MSR Bolts & Parts

This high quality bolt carrier group is a valuable addition to your AR15 build. Features: M16-cut carrier Machined from 8620 steel Carrier has forward assist serrations Mil-Spec phosphate coating Properly staked gas key Chrome lined gas key and bolt...

BoreBuddy Adjustable Bolt Weight (Gen 4) Gen 4 is here! It’s everything Gen 3 was, but much more robust and features tool less internal weight adjustment! Our 22lr AR bolt weight system reduces bolt velocity, delaying case ejection and reducing the...

The BoreBuddy bolt buffer prevents the bolt from slamming into the backplate when the rifle is fired. This reduces the noise generated by the cycling of the bolt and reduces wear and tear to the bolt and the lower receiver. When shooting suppressed, a...

BoreBuddy’s bolt group is upgraded by default! These come with a Gen 2 collar, Gen 2 quiet collar, or a chamber adapter, a hardened round firing pin, a hardened extractor, and a 6lb recoil spring. No need to swap parts in the bolt for reliability,...

These parts put pressure against the back of the 22lr bolt carrier group and increase the reliability of both conversions and dedicated 22lr uppers. Designed to fit rifles and conversion kits with a CMMG/Atchisson/Ciener style bolt. These parts provide...

Turned on a precision Swiss lathe from carefully selected high strength steel and then heat treated to our proprietary specifications. The back of the pin is profiled to center the hammer impact for longer firing pin life as well as reduced chance of out...

The BoreBuddy Hardened Power Extractor kit increases extraction reliability. Each kit contains 1 extractor, 1 extractor pin and 2 springs (one of each power level). Designed to fit rifles and conversion kits with a Borebuddy/CMMG/RTB/PSA style bolt. The...

M10X firing pin assembly for the M10X Series. Durable stainless steel firing pin. Manufactured in the USA Material: Stainless Steel Length: 3.7” x .25” .15” (94.3mm x 6.4mm x 4mm) Weight:  .2oz (6g)

The Rainier Arms Precision Match .308 BCG in Black Nitride is machined and finished to a higher standard to meet and exceed all Mil Spec. It is machined using the most precise equipment in the industry. The bolts are MPI tested & Marked to give you...

The Sylvan Arms Silent Capture Bolt Extension is hollowed out allowing you to run silent capture buffer spring systems with our Gen 3. Folding Stock Adapter. Designed for a 5/8 (.625) in. ID Bolt Carrier. Make sure that this will fit your configuration...