Guntec USA .308 Bolt Carrier Group - Nitride

Manufactured by Guntec USA
Manufactured by Guntec USA
7 Reviews
$149.99 $198.95

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



This Guntec BCG was made for 7.62x51 / .308 Cal Platforms.  It is Nitride treated, HPT and MPI tested and marked with a 9310 Hardened Steel Bolt, 17-4 Stainless Steel Firing Pin (Heat treated to H900 Condition), and an 8620 carrier and gas key.  Made in the USA, this group comes fully assembled with properly torqued and staked gas key.
See More


Bolt FinishSalt Bath Nitride
Bolt Material9310 Steel
BrandGuntec USA
Caliber Gauge.308 Win
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleDPMS Pattern Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected

Ratings & Reviews

7 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews

Bad Extractor

by -

Love Primary Arms but hated this bolt. Was useless from the start. Extractor would not grab brass. Bought a new extractor , worked fine after that.

Trying to restore balance


You replaced the extractor and it worked perfectly? A faulty extractor deserves a one-star review? Really? Did you even bother contacting PA about it? People need to learn how to review before they are allowed to do so.

Good Bolt, Great price

by -

The long and short of it: Good bolt certainly for price point certainly so as it has FA cuts. I built a LR308 DPMS pattern with high profile billet upper and forged 7075 lower. Had all kinds of high pressure signs with failure to extract (to the bolt's CREDIT, it tore the rim off the case) and mildly dimpled primer (extrusion thru the firing pin hole). Swapped out with another known good bolt, same issue. Narrowed it down (once I eyeballed the barrel's chamber) to an out of spec, NASTY gouged chamber....not a PA product. Replaced barrel with a PA acquired BCA 308 16" barrel and the rifle worked flawlessly! NOW.....the brass still had a dimple on the primer however the primer itself was not flattened and there were no other signs of excessive pressure. Either the FP is undersize or the FP hole in bolt face is slightly oversize. I am happy/comfortable with the bolt and will buy another for my second build which is under way.

Highly Recommended Bolt Carrier Group..A+++

by -

This BCG is perfect and flawless in every way. I have fired 185 rounds of varying weights with this BCG with out any issues. I suggest stocking up at this price. I just bought a second one as a backup or to build a second rifle.


by -

Well made and reliable. No headspace or extractor issues, ever!
Lubed it up a and shot 200 rounds without a single problem !!

Oversize FP Hole

by -

The carrier is OK for the price but the oversized firing pin hole in the bolt cut holes in my primers. No, they weren't overpressure loads just my minimums for load testing. Pays to measure everything before using. Kind of ruined my range trip.

Good bolt for the price.

by -

I bought this as a backup and when my primary one had some issues I tossed this in. This bolt carrier has run flawlessly since the moment it was tossed it. I've run probably 500 rounds through my rifle before writing this review. Bolt carrier group has minor wear on it and still wipes clean with ease. Keep in mind this bolt carrier has a warranty through the manufacturer.