Make sure the rifle is unloaded. Remove the front and rear action screws, trigger guard and floor plate assembly, and internal magazine box. Replace the trigger guard/ floor plate assembly with the detachable magazine trigger guard assembly. Reinstall the action screws and tighten. Insert an unloaded magazine into the well and push up until it locks in place.
To remove the magazine, push the latch button inside the trigger guard forward. This will unlatch the magazine allowing it to fall free from the rifle.
NOSEDIVING: If the cartridges are nosediving into the front of the magazine while feeding, this is generally caused by the trigger guard assembly sitting too far from the the receiver. As the bolt nose picks up the rim of the case, if the rim is too low, this creates a fulcrum which allows the cartridge to pivot down in front. The procedure to fix this is to inlet the trigger guard deeper into the stock. No shim washers should be used in this case.
This system was designed around the Remington M-700 platform. The correct pillar height for the M-700 should be .735” at the front pillar and 1.250” at the rear. We see quite a few aftermarket stocks that have an incorrect pillar height, thus the need to send shim washers with our units. While the incorrect pillar height normally will not affect feeding when using the factory hinged floor plate units, it adversely affects the detachable magazine systems. This is due to the fact that in a factory system the cartridge feeds off of the rails of the receiver. With a magazine fed system, the placement of the magazine is critical for proper feeding. The top of the new trigger guard assembly should be kept relatively parallel to the receiver body.
Installing the shim washers is the easiest way to remedy the problem of short pillar height as long as the shims are placed between the trigger guard assembly and the stock. Installing anything between the receiver body and stock other than glassing compound, will be detrimental to accuracy. The best solution would be to glass bed the stock making any needed corrections to the pillar height at that time.
Note:We hold the patent on our magazines
Wyatt’s DetMag® system is designed to be a near drop-in replacement for Howa 1500 and Weatherby Vanguard short action bottom metal. Due to changes through the years of stock designs, some minor alterations will need to be made to the stock for the install.
First, check to make sure the gun is not loaded. Remove the front and rear trigger guard screws. Remove the trigger guard assembly and internal magazine box. The front of the web of stock material between the trigger guard and magazine well will need to be removed approximately .375” back toward the trigger to clear the new trigger guard. (See picture below)Tan stock is altered, black stock is factory. Replace these items with the DetMag system, reinsert front and rear guard screws and tighten. After installation, insert a magazine to check for latching. If the magazine fails to latch or unlatch, a shim washer may be needed between the trigger guard assembly and the stock. These shim washers are available at hardware stores. The pillar lengths should be .650” for the front and 1.100” for the rear.
On .223 models, it will be necessary to shorten the bolt stop about 1/2".