The Browning Buck Mark Micro Bull SR is a semi-automatic pistol chambered in .22 LR with a 4.4-inch bull barrel and a matte blued finish. It holds 10+1 rounds and has an optic-ready slide with an RMSC footprint for direct red dot mounting without an adapter. The SR designation indicates the optics-ready cut is present on this variant. 
 

Key Specifications 

• Brand: Browning 
• Model: Buck Mark Micro Bull SR 
• Caliber: .22 LR 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 4.4 in 
• Color/Finish: Matte Black / Matte Blued 
   

Detailed Features 

• 4.4-inch bull barrel profile 
• RMSC footprint cut for optic-ready mounting 
• Matte blued finish throughout 
• 10+1 round capacity 
• Compact Micro frame size

The Buck Mark Micro Bull SR gets picked up primarily by shooters who want a compact .22 LR pistol with a direct optics mount. The RMSC footprint is the headline feature and owners who add a small red dot report a noticeably cleaner sight picture than with the factory irons.

The 4.4-inch bull barrel is well-regarded for consistency and the matte blued finish holds up reasonably well to regular range use. Some owners note the blued steel requires a bit more care against moisture than a coated or stainless surface would.

On the Micro frame specifically, opinions split between those who find the shorter grip ideal for smaller hands and those who would prefer the standard Buck Mark length. Feeding reliability on quality .22 LR ammunition is generally praised; bulk-pack ammunition occasionally causes reliability complaints.