PS90 Short Barrel Rifle Conversions

You may have read elsewhere on the web that the PS90 factory barrel can’t be cut down and threaded as they have chrome bores and the chrome will flake and the accuracy will be poor.  That statement is only partially right.  They do have chrome bores but we have done quite a few PS90 SBR conversions and none of them exhibit flaking chrome or poor accuracy.  If proper procedures are followed neither accuracy nor reliability are negatively effected. 

On our SBR conversions we cut the shroud off of the barrel and cut it back to the correct length of 10.4”.  We then thread the barrel M12x1 LH, just like the P90 SMG and install one of our custom M12x1 LH to ½-28 thread adapters.  Unlike other ½-28 adapters ours is compatible with the factory 3 point sling and allows the use of any AR-15 sound or flash suppressor.   

There are 3 basic ordering options for the PS90 SBR’s.  First, we can sell you a gun with the conversion already done.  We normally have several in stock in various configurations.  E-mail Mark McWillis at mmcwillis@comcast.net for current pricing and availability.

If you already have a PS90 and have an approved Form 1 send us the barrel ONLY, along with a copy of the approved Form 1, and we will cut and crown the barrel, thread it M12x1 LEFT HAND and ship it back to you with a thread adapter for you to install in your receiver.  The cost for this conversion is currently $156.00 and does NOT include engraving the receiver.  Under Current BATFE regulations if you do the Form 1 conversion your name, city and state must be engraved on the receiver in plain sight in letters at least 1/16” high and at least .003 deep.