Hey guys,

We just finished initial testing of three nearly identical Broken Arms LR308 lower builds.  Unfortunately, we are getting about 30% light primer strikes equally on both factory brass (Winchester and Remington) and factory steel case (Tulammo) ammunition. 

We milled our 308 BA lowers in December while awaiting the arrival of our complete Aero Precision M5 uppers, BCGs, and lower parts kits purchased from Davidson Defense in Orem Utah.  On arrival, one of the handguards was installed with stripped and cross-threaded screws, so we sent that one back for repair/replacement.  In the meantime, the other two builds were completed and we began test firing to make sure everything cycled ok.  Right off the bat we encountered light primer strikes on both factory brass and steel case ammo.  When the third rifle came back with a new handguard, we test-fired it and discovered it also had the very same problem with LPS. 

The builds are identical with only one exception.  Two of the rifles use a Davidson Defense 3lb ultra match drop in trigger and the other one uses the standard trigger from the Aero Precision M5 standard parts kit.  The BCG's are United Defense brand, nickel boron coated, and supplied by Davidson Defense.  

We are now waiting on a reply from Davidson Defense as to whether they want us to send the upper builds back for testing.  However, in our discussions with them over the phone this past Friday they expressed concerns about our 80% lowers possibly contributing to the LPS problems and hinted that we might need to find another 308 lower locally to do our own testing before they could approve a RMA.  They were very good about repairing the initial problem with the stripped handguard screws, but they now seem reluctant to help us solve the LPS issue. 

So...   I'm wondering if any of you have an opinion about whether a LPS issue could be related to the lowers in some way??   I suspect they are just looking for some reason to avoid paying for the return and diagnosis time, but I'm just interested in getting these rifles to go BANG every time we pull the triggers. 

Any ideas on what could be causing the LPS issue and whether it could or could not be related in some way to the lowers would be greatly appreciated.   Thanks guys!
 

Last edited by Pisky (2/19/2020 4:41 pm)