Investors

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Aug. 21, 2012) - FIRST MAJESTIC SILVER CORP. (TSX:FR)(NYSE:AG)(FRANKFURT:FMV) (the "Company" or "First Majestic") is pleased to announce an updated and restated NI 43-101 Technical Report ("TR") and Pre-Feasibility Study ("PFS") for the Del Toro Silver Mine.

REPORTED HIGHLIGHTS

• Silver Equivalent Measured & Indicated Resources increased to 76.5 million ounces
• Silver Equivalent Inferred Resources increased to 81.8 million ounces
• Average Measured and Indicated silver grade increased by 20% to 175 g/t
• Total estimated production to reach 7.2 million silver equivalent ounces containing 5.4 million pure silver ounces in 2014
• Subsequent to the Technical Report's cut-off date, on August 13, 2012, the Company received the final permit from the Mexican government approving the cyanidation circuit and the enlarged 4,000 tpd plant
• Estimated total direct operating costs are $35.00 per tonne and cash costs of $7.05 per ounce of silver on a by-product basis for LOM
• Post Tax Net Present Value ("NPV") at 5% discount increased by 30% to US$191.1 million using US$25 silver price
• Internal Rate of Return ("IRR") increased from 43% to 49% with a payback period of 3.5 years
• Total capital requirement over three years remains $124.2 million, inclusive of a 5% contingency
• The Del Toro Silver Mine is 100% owned by First Majestic Silver and there are no royalties payable

Due to improved metallurgical results and improved economics, the Company decided to re-state the previously released Pre-Feasibility Study dated March 31, 2012. This updated and restated NI 43-101 TR and PFS also considers further exploration and development work completed as at the cut-off date of June 30, 2012. These estimates include all work completed as at the cut-off date, including a total of 45,143 metres of diamond drilling over 141 holes and underground development totalling 9,850 metres. Six drill rigs remain active on site and a total of 5,725 metres drilled over 13 holes subsequent to the cut-off date were not included in this report.

The new Resource estimates as at the June 30, 2012 cut-off date consist of 76.5 million ounces of silver equivalent in Measured and Indicated Resources, plus an additional 81.8 million ounces contained in Inferred Resources. Total tonnage consists of 8.6 million tonnes of Measured and Indicated Resources, representing a 9% decreases from prior estimates plus an additional 7.5 million tonnes of Inferred Resources, representing a 19% decrease from prior estimates. The decrease in tonnage is a result of the reclassification of a large zinc ore body, called the San Juan Zinc deposit, into a new Inferred Mineral Resource pending additional resource definition. More details can be seen in the table below.

Construction of the new 4,000 tpd dual circuit processing mill commenced in April 2011. Production is presently scheduled to commence at the end of 2012. A delay in equipment delivery has resulted in some minor delays of the expected start-up date. Ramp up of production used in the PFS was as follows: Phase 1 - (starting in December 2012 through the first half of 2013) includes sulfide ore processing through the flotation circuit at a capacity of 1,000 tpd; Phase 2 - (beginning in the last half of 2013) includes oxide ore processing through cyanide leaching at a capacity of 1,000 tpd plus sulfide ore processing through flotation at a capacity of 1,000 tpd for total throughput of 2,000 tpd; Phase 3 - (Years 2014 through 2016) includes sulfide-ore processing (flotation) at a capacity of 2,000 tpd and oxide-ore processing (cyanide leaching) at a capacity of 2,000 tpd; Phase 4 (Years 2017 through 2019) includes sulfide-ore processing (flotation) at a capacity of 2,500 tpd in 2017, and 2,900 tpd in 2018 and 2019, plus oxide-ore processing (cyanide leaching) at a capacity of 1,500 tpd in 2017 and 1,000 tpd for 2018.

Total estimated throughput, described in more detail in the table below, is expected to reach a production level of approximately 7.2 million equivalent ounces of silver in 2014, represented by 5.4 million ounces of pure silver annually plus approximately 23.0 million pounds of lead and 25.2 million pounds of zinc.

Keith Neumeyer, CEO and President of First Majestic Silver, states: "The recent great news regarding the receipt of our final permit allowing for the full 4,000 tpd production at the Del Toro mill, including the allowance for doré production, is another major milestone for this project. The decision to construct a new state of the art laboratory as part of the La Parrilla expansion which is only 60 kms away has already proven to be a huge benefit to First Majestic. Based on the latest results from our metallurgical testing, we were able to improve the recoveries and economics of Del Toro. The La Parrilla lab will further assist the Company in responding to the needs of each of our mines as a specialized centralized facility. We have also been able to complete the construction of the sewage treatment facility for the town of Chalchihuites, which is on standby waiting for the mill production to commence."

The following two summary tables were taken from the complete Del Toro Silver Mine updated and restated NI 43-101 TR and PFS prepared by Pincock Allan & Holt, Lakewood, Colorado (PAH). Shareholders and interested parties are encouraged to read this positive report in its entirety which can be viewed on SEDAR (www.sedar.com) and the Company's web site at www.firstmajestic.com.

Mineral Resources "In-Situ" as of June 30, 2012

Deposit	Tonnes M	Width m	Au g/t	Ag g/t	Pb %	Zn %	Ag (only) oz	Ag oz eq	Total Ag oz eq
Mineral Measured Resources Sulfides
Total Measured Resources	574,917	5.67	0.00	250	5.00	3.95	4,613,963	4,081,853	8,695,816
Mineral Indicated Resources Sulfides
Total Indicated Resources	4,823,710	9.07	0.12	182	2.93	3.04	28,251,935	24,030,831	52,282,767
Total Measured + Inidicated Sulfides	5,398,628	8.71	0.11	189	3.15	3.14	32,865,899	28,112,684	60,978,583
Mineral Measured Resources Oxides
Total Measured Resources	1,388,751	14.10	0.00	146	1.57	2.00	6,508,290	461	6,508,751
Mineral Indicated Resources Oxides
Total Indicated Resources	1,823,126	14.40	0.01	154	2.07	2.28	9,018,480	24,421	9,042,901
Total Measured + Indicated Oxides	3,211,877	14.29	0.00	151	1.88	2.18	15,526,770	24,882	15,551,652
Measured + Indicated Sulfides + Oxides	8,610,505	10.45	0.07	175	2.67	2.77	48,392,669	28,137,566	76,530,235
PAH review = Mineral Resources "In Situ", including mine dilution, but no mine and metallurgical recoveries.
Resource estimate based on Cutoff grade of Ag eq = Sulfides 118 g/tonne; Oxides 63 g/tonne. Metal prices at = Ag-25/oz, Au-$1600/oz,Pb-$0.90/lb, Zn-$0.90/lb.
Mineral Inferred Resources
Mineral Inferred Resources Sulfides
Total Inferred Resources Sulfides	6,720,568	8.44	0.11	173	2.92	4.26	37,472,703	39,887,080	77,359,783
Mineral Inferred Resources Oxides
Total Inferred Resources Oxides	777,194	6.69	-	178	2.35	2.48	4,450,051	0	4,450,051
Total Inferred Sulfides + Oxides	7,497,762	8.32	0.11	174	2.87	4.08	41,922,754	39,887,080	81,809,834
Metal Prices
Au = $1,600/oz Pb = $0.90/lb
Ag = $25/oz Zn = $0.90/lb
PAH review = Mineral Resources "In Situ", including mine dilution, but no mine and metallurgical recoveries.
Resource estimate based on Cutoff grade of Ag eq = Sulfides 118 g/tonne; Oxides 63 g/tonne. Metal prices at = Ag-25/oz, Au-$1600/oz,Pb-$0.90/lb, Zn-$0.90/lb.
Due to the uncertainty that may be attached to Inferred Mineral Resources, it cannot be assumed that all or any part of an Inferred Mineral Resource will be upgraded to an Indicated or Measured Mineral Resource as a result of continued exploration.
Inferred Mineral Resources do not have economic value and these have not been included in this TR as aprt of the economic analysis.
Inferred Resources Sulfides - San Juan Zinc Deposit	3,084,929	7.95	0.00	6.00	0.18	3.56
Note: No metallurgical test have been completed

In PAH's opinion, and as described in the report, numerous prospective mineralized structures and alteration zones within the Del Toro property holdings remain either under-explored or unexplored such as the already known areas of San Juan, Perseverancia and San Nicolas and the areas for future exploration such as the extension to depth of the Perseverancia chimney, the extension to the Northeast of the San Nicolas Vein, the newly purchased Dolores mine, in addition to Lourdes, Las Cotorras, La Nueva, India, Tayoltita, El Huitrón, and La Verdiosa structures.

Life of Mine Production Schedule

CATEGORY	YEARS								TOTALS
	2012	2013	2014	2015	2016	2017	2018	2019
SULFIDE ORE
Tonnes Mined by Mine and/or Orebody
Total Sulfide Tonnes Mined/Milled	82,000	350,000	660,000	660,000	660,000	851,381	971,258	707,417	4,942,056
Average Head Grades
Silver - gpt	176	184	176	176	185	186	187	175	182
Lead - %	2.87	3.12	2.88	2.88	3.15	3.17	3.19	2.82	3.03
Zinc - %	2.94	3.04	2.94	2.94	3.05	3.06	3.07	2.91	3.00
Gold - gpt	0.11	0.09	0.11	0.11	0.09	0.09	0.09	0.11	0.10
OXIDE ORE
Tonnes Mined by Mine and/or Orebody
Total Oxide Tonnes Mined/Milled	0	240,000	660,000	660,000	660,000	468,619	348,742	0	3,037,361
Head Grades
* Silver - gpt	0	146	141	141	141	144	159	0	144
SULFIDES + OXIDES
Total Tonnes Mined & Milled, All Mines	82,000	590,000	1,320,000	1,320,000	1,320,000	1,320,000	1,320,000	707,417	7,979,417
Average Head Grades
Silver - gpt	176.28	168.47	158.55	158.55	163.11	170.95	179.23	174.57	167.11
** Lead - %	2.87	3.12	2.88	2.88	3.15	3.17	3.19	2.82	3.03
** Zinc - %	2.94	3.04	Investors Corporate Presentation Why Silver? Learn More Subscribe Submit close I agree to and consent to receive news, updates, and other communications by way of commercial electronic messages (including email) from First Majestic Silver Corp. I understand I may withdraw consent at any time by clicking the unsubscribe link contained in all emails from First Majestic Silver Corp. First Majestic Silver Corp. 1800 - 925 West Georgia Street Vancouver, British Columbia V6C3L2 Canada info@firstmajestic.com Continue