Sig MCX 9" SUR300 Suppressed Upper Receiver 300BLK
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Sig Sauer's Suppressed Upper Reciever (SUR) in .300Blk is a complete MCX upper with bolt and charging handle included. Compatible with MCX and MCX VIRTUS systems, this upper is also compatible with most standard M4/AR-15 lower recievers. Sporting a 9 inch 300BLK barrel with a pinned and welded titanium suppressor, this upper comes in at a "barrel length" of 16.375" meaning that it does not require a SBR lower. This means that the SUR300 is a fantastic way to upgrade that old lower receiver you have laying around with the MCX VIRTUS piston operating system and a 2 position gas valve!
To that end, this upper ships with a MATCHLITE DUO two-stage match-grade drop in trigger as well as an AR 1913 receiver adapter for use with a folding stock. You really can't ask for a better package deal to upgrade an existing AR lower receiver!
Lastly, the silencer included with this upper receiver is proprietary to this system and is optimized for use on .300BLK.
- Caliber: .300BLK
- Receiver Material: 7075 Aluminum
- Receiver Finish: Mil-Spec Type III Hard-Coat Anodize
- Barrel Material: Cold Hammer-Forged Carbon Steel
- Barrel Finish: Nitride
- Barrel Length: 9"
- Barrel Twist: 1:5in
- Suppressor Material: Titanium
- Suppressor Finish: Black DLC
- Mount: Pinned and Welded
- Weight 5.7lbs
- QD Sling Adapter
- MATCHLITE DUO Trigger
- M4/AR15 1913 Receiver Adapter and Folding Stock Adapter
- Owners Manual
Just in time
I was going to upgrade my somewhat 'old' lower. Looked at various options. Decided to give this dedicated suppressor setup a try.