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Getting an AR-308 to cycle smoothly comes down to the recoil parts working together, and that's exactly what this Luth-AR kit handles. It's a complete commercial-spec carbine buffer assembly built for .308/7.62 builds, giving you the right components in one box instead of chasing parts one at a time. The buffer itself is weighted for the longer .308 bolt travel, which is the piece a lot of folks get wrong when they try to run AR-15 parts in a bigger rifle.
The kit centers on a commercial 6-position carbine receiver extension machined from 6061-T6 aluminum with a hardcoat anodized black finish, so it holds up to real range use. Inside you get a 3.8 oz .308/7.62 buffer body, a matching .308/7.62 buffer spring, plus the latch plate and lock ring needed to lock the tube to your lower. That 3.8 oz weight sits right in the sweet spot for standard AR-10 pattern carbine setups and keeps the bolt carrier group timed properly.
The important thing to know is this is a commercial-diameter tube, which runs slightly larger than mil-spec at the stock-mounting area. Commercial and mil-spec tubes are not interchangeable when it comes to your buttstock, so if you're pairing this with a collapsible stock, make sure that stock is cut for commercial dimensions. It's a common mix-up, and matching the two is the difference between a stock that clicks on clean and one that fights you.
This assembly works great for a fresh AR-308 build or for converting an existing rifle over to a commercial carbine recoil setup. Luth-AR builds these in the USA and has a solid reputation among the AR-10 and LR-308 crowd for parts that just fit and function. If your gas system and buffer weight are matched up, expect smooth, reliable cycling right out of the gate.
Yes, this Luth-AR kit is made for .308/7.62 platforms including AR-10, AR-308, and LR-308 pattern rifles. The 3.8 oz buffer is sized for the longer .308 bolt travel, so it cycles correctly where an AR-15 carbine buffer would be too long. It works well for a new build or converting an existing rifle to a commercial carbine recoil system.
The tube diameter at the stock-mounting area is the main difference. Commercial tubes run slightly larger than mil-spec, and the two are not interchangeable when it comes to your buttstock. Pick this commercial version only if your collapsible stock is cut for commercial dimensions.
It covers the core recoil components: the commercial carbine buffer tube, a 3.8 oz .308 buffer body, the buffer spring, plus the latch plate and lock ring to secure the tube to your lower. You'll still need your own buttstock and, of course, a compatible lower receiver. Everything in the box works together for a properly timed .308 carbine setup.
This is set up for carbine buffer geometry, and mixing a rifle-length gas system with a carbine buffer system can cause reliability issues. It's best matched to a rifle running an appropriate gas length for a carbine buffer setup. If you're unsure about your gas system length, verify that before ordering.
| UPC | 859819007232 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 308-C-BAP |
| Style | Commercial |
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