I have an Arsenal SLR105 at my LGS to have the Bulgarian FH/GB combo installed. Was going to go with a fake flash hider over the 16" barrel but am thinking of just having the barrel chopped and recrowned. Then having a CNC warrior extended booster pinned to meet the 16" requirements. Will the booster that I believe is Russian spec work with the Bulgarian FH/GB ? Anyone had any issues doing this type of build ?

if you're talking about this one:

Extended brake


Then yes, it will work. Indexing is a non issue with these between Russian and Bulgarian.

ETA: The 4 piece is preferable IMO due to being able to clean it vs using other extensions.

Thank You !!! Getting the CNC Warrior in on Thursday and then she is off to get cut, crowned and into AK105 type form !!! Can't Wait
Also, anyone looking I seen a Bulgarian FS/GB combo in the EE for sale. The person is asking I think 250 I paid 90 bucks for mine a few years back

http://www.ar15.com/forums/t_7_123/1679711_Bulgarian-combo-sight-gas-block-AK-142B.html