SIG Brace Bolt Guns....
https://www.tactical-life.com/firear...SZ2oau5AA4SVYE
Remington Model 700CP Rifle-Caliber Pistol
It doesn’t come with a brace but the back shows it can accept an M4 back plate just like their chassis rifle.
It is a true bolt action, but with a pistol grip and a short barrel. The barrel comes in two different lengths, depending upon which of the three calibers it is chambered for:
.308 = 12.5 inches
.223 & .300 AAC Blackout = 10.5 inches
The guns are setup to be used with any AI (Accuracy International) pattern magazines in this chassis. The model I shot had Magpul magazines.
The top has an 8-inch removable Picatinny rail. The forend is free floated and features M-LOK attachment points on all eight sides for the full length.