Xcr-l .300 blk

Unfortunately the location of the gas port on the full length rifle isn't idea for 300 Blockout, there just isn't much pressure left by the time the gas gets that far down the barrel.

Robinson Arms has a working XCR Micro prototype in 300 Blackout, but no ETA when it will go into production, they have way too many stuff on their plate.
 
Just buy an ACR and I'll help you source a non restricted (or restricted) length barrel for it in 300BLK :) I have mine almost finished and am going out to test again this week. I think it should be good now as it was almost cycling properly before my last adjustment.
When Rob Arms comes out with a NR 300BLK barrel I may be a little more interested in the platform but I've already committed to the ACR now so I guess they are too late to get my money.
 
Edit to my previous post. My 300BLK ACR is working awesome with supersonic loads and subsonics as well as everything in between. My 155gr A-max load is shooting sub moa and I haven't had a failure of any kind since adjusting the gas port size.

Good to hear Rob Arms finally decided to get this kit together, I think the 300BLK is superior to the x39 in every aspect other than price but as long as you're reloading I can load rounds almost as cheap as x39.
 
Received an email back from wolverine supplies last week they are taking pretty orders on the 300 black out barrels priced at 450.00. No word on shipping date yet.
 
join xcrforum .com there are RA employees on that forum and lots of info on the upcoming 300 blk option

right off RA's website:

Update 17Oct2014

Order your .300 BLK XCR-L Rifles NOW Supplies are Limited. They should begin shipping before Thanksgiving. The XCR-L works very well with the .300 BLK. The gas system is adjustable so that the XCR-L can fire supersonic or subsonic ammunition with or without a suppressor. The XCR-L in .300 BLK is offered in a variety of barrel lengths from 9.3" to 18.6". The neat thing about this is that all these lengths will fit in our Standard Length Upper Receiver. Conversion Kits will also be available in the lengths mentioned. The Price of the XCR-L .300 BLK Rifles & Conversion kits is the same as the other XCR-L Rifles and Conversion kits. We will post images of some of the XCR-L .300 BLK Rifles shortly.
 
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