Ballistic Machinist - This is a Remington 870 barrel with a built in improved cylinder choke. It has a muzzle diameter of .715 and was made in the early 70's. It has
![Vepr 12 Gauge Choke Set "Full and Extra Full Chokes are NOT recommended for slug shells" - SGM Tactical Vepr 12 Gauge Choke Set "Full and Extra Full Chokes are NOT recommended for slug shells" - SGM Tactical](https://www.sgmtactical.com/wp-content/uploads/2013/01/chokeset.jpg)
Vepr 12 Gauge Choke Set "Full and Extra Full Chokes are NOT recommended for slug shells" - SGM Tactical
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