Military Arms Channel Picks HK MR762A4 Over SIG Spear in SBR Test

Military Arms Channel puts two short-barreled battle rifles head to head: the HK MR762A4 and the SIG M7 Spear, both set up as SBRs with 13-inch barrels. The video runs through handling, recoil, accuracy and overall feel to see which rifle comes out ahead.

Snapshot

Military Arms Channel compares the HK MR762A4 and SIG M7 Spear as short-barreled rifles, weighing recoil feel, weight, controls and accuracy at 100 yards, and notes lax enforcement as one reason such builds are spreading. The host favors the HK for its smoother recoil and familiar handling, though he likes the SIG's looks and says the coming M8 might change his mind.

Key points

• Recoil: the host says the HK's short-stroke gas piston delivers a smooth, gentle push, while the SIG has a sharper, more abrupt "pop" that disrupts the sight picture slightly more, though both stay controllable.
• Weight: the SIG runs about a pound heavier but carries it well; the host notes the HK's lighter titanium suppressor also affects the muzzle feel comparison.
• Ergonomics: the host says both rifles feel familiar, with controls landing where shooters expect them.
• Accuracy: firing five rounds of Federal 150-grain ball at 100 yards from each rifle, the host calls the groups close, with the HK edging ahead once a flyer is set aside.
• Context: the host points to lax ATF enforcement of NFA short-barrel rules as a reason these compact builds are becoming more common.

Quick take

After weighing shootability, weight, and ergonomics, the host leans toward the HK MR762A4 for this comparison, citing its smoother recoil impulse and familiar feel, while still praising the SIG's looks and noting that SIG's upcoming lighter M8 could change his thinking once he gets to test it.

Watch the full video: Military Arms Channel