Once a common sight at professional paintball. A 1991 WGP Sniper II Serial Number #3810. Required to make a Trilogy a pump gun. Within the Trilogy Autococker.
SERIAL NUMBERS OFTEN ALLOW YOU TO DETERMINE YEAR OF MANUFACTURE Knowing the year your vintage firearm was made makes it easier to decide which gun catalog we sell will give you the best information about the company, models made and more. To help you determine the year made, find your serial number and then select a link from those below to sites that offer serial dates. The offers serial numbers for the following makers: AYA, Boss & Co., Ltd, Browning, EJ Churchill, Colt, Colt Black Powder 2nd Gen, John Dickson & Son, AH Fox, German early Date Codes, German Modern Date Codes, Stephen Grant, WW Greener, Harrington & Richardson, High Standard, Holland & Holland, Italian Year of Mfg. Date Codes, Ithaca Gun Co., Charles Lancaster, Joseph Lang, Marlin Firearms, Mauser Broomhandles, Parker Brothers Shotguns, Piotti, James Purdey, Remington Date Code & SxS Shotguns, Savage/Stevens, LC Smith, Smith & Wesson, Spanish Year of Mfg.
Date Codes, Sturm, Ruger & Co., Winchester Rifles, Winchester Rifle & Shotgun 1969+, Winchester Shotguns.
Paintball - WARPIG - World And Regional Paintball Information Guide - News Translations Save Those Serial Numbers by Bill Mills - Photos by Dawn Mills September 2006 One of the downsides to the massive growth paintball has seen over the last several years is that there is enough of a demand for paintball gear, and market for used gear, that it has become a more desirable target for thieves – even to the point that a one web site recently published tips on how to steal equipment from tournament staging areas. 
Many steps can be taken to fight theft of paintball equipment – both in terms of making it less desirable to steal, and increasing the chances of recovery after theft. In 1963, the Southern California city of Monterey Park was besieged by a rash of hubcap thefts.
Everett Holladay, Chief of the city’s police force recommended that residents engrave their license plate numbers in the hubcaps of their car. This would make recovered hubcaps easier to return, and stolen hubcaps rather obvious when the thief tried to sell them as used. This community campaign soon expanded to the idea of making sure valuables had unique identification, and spread throughout the US, and even to other nations under the name “Operation Identification.” While it is not a nationally organized program, many police departments use the name Operation Identification for their public awareness campaigns encouraging citizens in their community to take some very simple theft deterrent steps.