FCD RSA-H 1913 Rail Sling Adapter, Heavy

RSA-H is related to MSH (MLOK Sling Loop, Heavy,), a collaboration with Sol at Rooftop Defense, both of these sling adapters feature a curved 1.25 wide sling loop that does away with a QD swivel, and place the sling closer to the bore.

We like QD well enough, but not everyone wants or needs the quick detach capability, and it’s not necessary on both ends of the sling.  For those that don’t need or want QD, it’s better to not have a QD swivel that adds weight and bulk to the rifle.  Since not all QD swivels are created equally, their quality vary, it makes little sense to have QD where it’s not needed, and add a potential point of failure in the process.

Below is a QD swivel that lost its ball bearings.  If you do like and use the QD utility, we suggest a QD swivel made in steel, and made in USA.

Machined from a solid 4140 block of steel, RSA-H is immensely strong.  The bolt is partially threaded and serves a recoil lug, the clamp is also exquisitely machined from 4140 steel that dovetails into the RSA-H body.  The Picatinny bolt clamp is uniquely shaped so it can only be installed one way (the correct way) and when mated to the RSA-H, the two fit as they were one piece.

RSA-H’s loop can accommodate sling widths up to 1.25″.  As designed, RSA-H also serves a dual purpose as an equipment tethering point for high value NODs and thermal optics.

Torque value for RSA-H Picatinny bolt: 40 in lb.

RSA-H is compatible with BFG’s ULoop, but not HK hooks.  RSA-H is designed so the sling can go directly through its curved loop sans any additional sling attachment.

RSA is proudly designed and made in TX, USA.