Contact us for an RMA number by telephone (909) 308-0847 or email You will need a copy of the receipt from an Authorized PRESMA Dealer.Unauthorized Packages without a RMA number will not be accepted. Obtain a RMA (Return Merchandise Authorization) number BEFORE returning any products and prominently write it on the outside of the package.Batteries and/or damage caused by batteries.Missing proof of ownership (no receipt from authorized dealer.).

Accidental damage (such as dropping), abuse or misuse of products.

Failure to provide proper care and maintenance.

Alteration, modification, disassembly, repair and reassembly of our original design of the product.

Presma Inc., offers a Lifetime Warranty to the original purchaser of any new PRESMA item(s), from the date of purchase (item(s) will be free from defects in material and workmanship). I have also found this nut, but am unsure if it would fit/work for my 308.WHO AND WHAT IS COVERED UNDER THIS WARRANTY, and for how long?

I have found this nut, but I am unsure of whether it would do what I need. Any help or guidance would be greatly appreciated! If it's just that I need a new/different barrel nut & slip/delta ring I am unsure of what I need/what would fit my rifle. I am unsure if the Firefield rail just isn't meant to fit my 308 or if I need to put on a different barrel nut & slip/delta ring? The only way to make it fit is to move the gas block forward a bit and then the ends of the rail nearest the slip/delta ring actually end up just ahead of the ring, but that would end up causing a pressure issue of the rifle not chambering a new round after being fired due to the gas block not being over the gas hole in the top of the barrel in the correct position. It appears as though the existing barrel nut is too thick for the quad rail as when I try to fit the two pieces into place the ends of the rail closest to the slip/delta ring end up being too far apart to screw together. I have a DPMS 308 Sportical that came with the factory handguard & a Firefield 6.7inch quad rail. I literally have been searching the forum since yesterday afternoon and haven't found what I'm trying to figure out, however it's entirely possible that I'm not using the correct terminology due to be new to ARs. My apologies if this is a redundant thread.

Dpms quad rail handguard