This was requested on another thread and here it is. It’s one of the better options for mounting a spare magazine holder on the S2K. Faster and easier than a belt mounted mag holder when performing a tactical reload and it doesn’t affect the maneuverability of the gun. The position of the holder is adjustable in 2 directions and is offset so it doesn’t interfere with the charging bolt. I use Picatinny rail to store my red dot scope on a quick release mount when I am using it as a truck gun. Scott
Spare Magazine Holder on S2K Buttstock for Glock Magazines
Monoki Keymod Picatinny Rail Sections, 5-Slot 7-Slot 13-Slot Lightweight Picatinny Rail Section for Keymod Handguard Mount Rail System (5/7/13-Slot) $14
Monstrum Tactical Lockdown Series Adjustable Height Riser Mount with Quick Release (2.5 inch Length with Quick Release) $15
Glock GLKMP17076 Mag Pouch 9Mm/40/357 Cal $10
Two size 6 - 3/4” flat head stainless steel screws
Three size 6 - 1/2” round head stainless steel bolts
Three size 6 stainless steel nuts
Three size 6 stainless steel washes
Amazing GOOP 170011 Marine Adhesive, 3.7 Fluid Ounces $8
Total Cost: Around $50
- Attach 7 slot, 3” Picatinny rail to the buttstock with two size 6 - 3/4” flat head stainless steel screws and Marine goop.
- Remove the left belt attachment on the mag pouch with scissors.
- Remove the upper section of riser mount and drill 3 holes for the bolts.
- Drill 3 holes in the right mag pouch belt attachment to match the holes in the riser mount.
- Apply Marine Goop to the areas of contact between the mag pouch and riser mount then install the bolts. Tighten the nuts until finger tight only. Apply more Marine Goop in between the nuts and the riser mount.
- Put a magazine in the mag pouch. If the pouch is perpendicular or 1-5 degrees angled outward, you do not need soapily a clamp. If the pouch is angled out more than 5 degrees, use a clamp to bring the pouch to 5 degrees. Check the retention of the pouch. If it is too tight, release the clamp a little until the retention is correct. Let the glue dry for 48 hours.
- Paint the heads of the bolts with paint or finger nail polish. (optional)